Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8c9d409df1fa24e…

MALICIOUS

PDF

46.4 KB Created: 2020-09-30 02:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 23f92e96dcb6ff5838810651b2cb8371 SHA-1: f1b2e350abf59c490b7e344bbff9146e6900f28a SHA-256: b8c9d409df1fa24ed63e11c45bbefca053d968a00695d6c9937b4ee1696f6b28
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/strik?keyword=neonatal+abstinence+syndrome+treatment+pdf In PDF document text
    • http://files.magicwoodotterhounds.com/uploads/1/3/1/0/131070859/supixu_mesalemur_mobaluvizafene.pdfIn PDF document text
    • http://files.dhayangtoon.com/uploads/1/3/1/0/131070912/5848000.pdfIn PDF document text
    • http://files.decksbydecamp.com/uploads/1/3/0/7/130775592/pafame_bejofubowokelap_ragenofodig_xubusekako.pdfIn PDF document text
    • http://sasufo.helpurchild.net/uploads/1/3/1/6/131606271/gufoxufu_romugiv_tizitazejodup_fokoxaso.pdfIn PDF document text
    • https://site-1037129.mozfiles.com/files/1037129/pidogamifadutumi.pdfIn PDF document text
    • https://site-1036858.mozfiles.com/files/1036858/53858284751.pdfIn PDF document text
    • https://site-1036816.mozfiles.com/files/1036816/27827520377.pdfIn PDF document text
    • http://files.stjoachimlockeford.com/uploads/1/3/2/8/132814930/baxasa.pdfIn PDF document text
    • http://vusom.woodlandsbiblechurch.net/uploads/1/3/0/7/130775447/2036862.pdfIn PDF document text
    • http://vajugog.motivationalshityall.com/uploads/1/3/1/4/131407668/lijofaxotev_vokexikiropikat_dekamoxede.pdfIn PDF document text
    • http://files.dancearth.com/uploads/1/3/0/7/130776591/godatujuxonifa_kajofupigeke_dapefimotili.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3350/5187/files/77874533789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3759/6575/files/rafazudaniforodowalowifax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2169/6149/files/thanksgiving_cake_decorating_pictures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/go_gps_joystick_fake_location_apk.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76AD 5512 bytes
SHA-256: 0a47625fb5e501354d297ec7bbab17e843e99115718b476972bc0e4e921a786a
font_01_sfnt_off0000895b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x895B 10316 bytes
SHA-256: 6f4c32e63696a52c65fb2b820339f17e73fcecfaea5accfbe75aefde9b52e145